View Full Version : Prescott Heat and Rendering...
0utlander 01-05-2005, 12:41 AM hey,
ive recently built a new system containing a prescott 3.4 and a 6800 GT. My issue is that the prescott is getting up to 75+ degrees c under load and the case becomes quite warm... this is after several hours of gaming. I have a Lian-Li 6070 case which i had to cut up to attach a side fan so i could try and reduce these temps... the fan seems to be helping out a bit but temps as u can see are still quite high. Im just a little concerned how these temps will affect rendering and overall PC functionality in the long run. Like is it OK to leave a pc with a cpu getting to 75C rendering constanly all day all night for several days? or will it melt or somthing :)
what would be an ideal temp to reach for a prescott under full load for constant rendering?
Thanks.
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stephen2002
01-05-2005, 02:03 AM
75C is bad. Generally for a desktop CPU try not to let it sit over 60C for extended periods of time.
What heat sink and thermal interface are you using?
novadude
01-05-2005, 03:26 AM
What can I say? You bought a Prescott :( They usually run ~70 at load, and aren't protected until 90C
Update the boards bios, as they usually fix temp readings with a new bios. Set the fan you added on the side to exhaust air, and see if that will drop temps. What is your room temp when this gets to 75C? Your case isn't really meant for cooling, but rather for being quiet.
Other things to try:
- leave the side door off of the case, and set a box fan near it to blow cool air in
- use arctic silver instead of cheap thermal pads, or cheap silicone crud <- those just aren't good enough
- check thge CPU voltage
the case you have doesn't seem to have a front intake and thats pretty important. what kind of PSU do you have on that? I would not recomend putting in a side fan because more often than not it distrupts the airflow thus actually hindering the cooling effect. unless your case comes with a side fan i would not put one in. although i would suggest cutting out the back grill and replacing it with a wire kind that reduces heat by about 1-2 C. also there is a small foam filter in the front usually i would take it out it doesn;t really do anthing but get cloged and stop the airflow. AS III or Ceramique is a better alternative to the standard cooling solution. 75 is not that bad but it is not recomended, what kind of CPU fan do you have on that? Rule of thumb never go with the standard issue Intel fans they don't cool that well.
0utlander
01-05-2005, 05:29 AM
thankx,
i should have mentioned that i have a 3d rocket cooler on the CPU running at max RPM's (4000). The intel one got incredibly noisy. The side fan is set to exhaust. The powersupply is an antec server 500 watt one. It gets warm. Ive been meaning to put some artic silver on in the hope that it will reduce temps. also the side exaust fan im using is kinda weak and im thinking of putting a better fan in its place.
pulling the cover off and putting a fan next to it cools it right down but thats annoying and defeats the purpse of my nice sleak case. also moths and water could easily enter the case then :)
I also have a prescott core (only 3.0ghz tho)
I've got this on it
http://www.newegg.com/app/ViewProductDesc.asp?description=35-128-003&depa=0
and in some protracted rendering tests i've done (just high rez, with highly subdivided cube, with extremely high AA), it hasn't gone above 65 and tends towards 62 (idles around 45C). So not great, but livable. I've also got a 120mm in the back and an 80mm in the front.
I did have some heat issues initially, but I redid the thermal paste and it dropped 10C (I had it on really thick the first time)
SOPLAND
01-05-2005, 05:57 AM
http://www.newegg.com/app/ViewProductDesc.asp?description=35-103-144&depa=1
I recommend this. I have one on a 3.4 gHz prescott because my old cooler wasn't cutting it. It's significantly quieter than the one Goon recommended, and my temps are rangin from 33 at idle to 55 under heavy load. You can run it fanless and that may be enough. I run with one fan but it gives you the option to attach 2 fans if you like.
http://www.newegg.com/app/ViewProductDesc.asp?description=35-103-144&depa=1
I recommend this. I have one on a 3.4 gHz prescott because my old cooler wasn't cutting it. It's significantly quieter than the one Goon recommended, and my temps are rangin from 33 at idle to 55 under heavy load. You can run it fanless and that may be enough. I run with one fan but it gives you the option to attach 2 fans if you like. looks nice. where can you get an adaptor kit? I was never able to find one
SOPLAND
01-05-2005, 06:22 AM
An adapter kit? On the box it says it's supposed to work on any AMD K8 (socket 754/940) and Intel P4 (socket 478). Is that what you mean? It comes with a brace for the back of the mother board and brackets and all the mounting hardware you should need.
Be warned, this thing is a monster. It's quite heavy and it has to be a bit over 4.5 inches tall. Other than size, I really like this cooler.
It's funny though, the cooler you linked is actually quite similar to the one I linked in design. The difference is that the one I linked is all copper, and the fans are side mounted.
oh, duh. I forgot that the prescott also came in 478. Mines an LGA775 which was a real PITA to find a fan for.
novadude
01-05-2005, 11:16 PM
pulling the cover off and putting a fan next to it cools it right down
Well, that really helps. Get three better 80mm fans and increase the airflow through that case. Also get some AS6 first, though. Enermax makes some good fans that do 40CFM @ 33dBa. You can find those on sale for ~$5 most of the time :)
Oh, is the side fan directly opposite of the CPU heatsink? If it is, switch that to intake and blow some cool air right into the heatsink's fan.
0utlander
01-05-2005, 11:27 PM
Goon, i 2 may have put to much thermal paste on. I will defintaly try some AS which seems a lot easier to apply(and has detailed instructions on the net) than the stuff that comes with the 3d rocket(which lacks proper instructions). my prescott is also 775 so the 3d rocket was really my only solution.
AdrianLazar
01-05-2005, 11:34 PM
i have a prescott @ 3.2 ghz and i really like it! it works really great, i have an intel cooler that was in the box with the proc. In xsi renders A LOT FASTER than the other comp that is a nortwood @ 3 ghz, and in 3dsmax with final render is no noticeable difference...
the temperature never got higher than 63 C and it render 24/7 (almost)... i removed the computer case
is water cooling an option for you?
if you wanna read up on it:
http://www.tomshardware.com/cpu/20040920/index.html
http://www.tomshardware.com/howto/20040630/index.html
and one only on watercooled LGA775:
http://www.tomshardware.com/howto/20040630/index.html
hope it helps
:)
I had the same problem with my P4 3.4 LGA 775. The temp of my cpu was 65º-70º in iddle, i didnt even tried it at full load... this was with the stock fan that came with the processor.
I decided to buy a CoolerMaster Hyper 48, and 2 internal fans (1 brings fresh air to the case - front, and the other takes the hot - back).
With this settings i achived a temp of 35-40 in iddle and 50º55 at full load. Not bad compared to the other temp that i was getting.
Hope this helps! :)
lv-88
01-06-2005, 02:30 PM
doesn't you prescott cpu's throttle when it reaches a certain temperature?
SOPLAND
01-07-2005, 01:31 AM
doesn't you prescott cpu's throttle when it reaches a certain temperature?
If by throttle you mean slow down to the speed on a 66 mhz Pentium I, then yes, it throttles.
0utlander
01-07-2005, 04:22 AM
this is only when it reaches like 90degrees right?
novadude
01-07-2005, 04:41 AM
90 degrees normally, but if it has no/little load it should throttle down until it gets a load (atleast, thats how intel did it in the Dothan line). I actually prefer the way newer CPUs down throttle at critical temps, rather than just shutting down, as this way the fans stay on and can cool it down. It also gives you a chance to change something in the bios if you really messed something up :)
Dimos
01-07-2005, 06:30 AM
You could check coolers from Zalman, there is a new model the 7700 with a 120mm fan. It should be ok, if it fits your motherboard. They also have a water cooling tower, with no fans at all, where you can connect the vga too.
any recommended water cooling?
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